commit https://github.com/vim/vim/commit/2588b5a43f049ddf542991050260237051caad77 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Mar 5 23:23:02 2016 +0100 patch 7.4.1498 Problem: Error for locked item when using json_decode(). (Shougo) Solution: Initialize v_lock.

--- a/src/json.c
+++ b/src/json.c
@@ -506,6 +506,7 @@ json_decode_object(js_read_T *reader, ty
 		return FAIL;
 	    }
 	    di->di_tv = item;
+	    di->di_tv.v_lock = 0;
 	    if (dict_add(res->vval.v_dict, di) == FAIL)
 	    {
 		dictitem_free(di);